📊 DASHBOARD

Updated just now
🌤️
72°F
Houston, TX
24hr Precip
0.0"
Humidity
65%
Wind
8 mph
✅ I&I Risk: LOW
No significant rainfall expected
Plant Setup
🏭
Configure
29 process types
Budget Setup
💰
Track
expenses & costs
Formulas
📐
Library
46 calculations
Daily Rounds
Checklist
inspections
Reports
📊
DMR/Monthly
generate reports
Calculators
🧮
Process
35+ calcs
Wizards
🧙
Calc Tools
step-by-step
AI Copilot
🤖
Assistant
ask anything
PM Calendar
📅
Schedule
maintenance
SCADA
🖥️
Live View
process monitor
Maintenance
🔧
Tracker
equipment
Lab Data
🔬
Results
compliance
Plant Status
NORMAL
Flow: 3.2 MGD
Compliance
95%
0 violations
DMR Due
📋
14
days remaining
Equipment
⚙️
5
🟢 Run
2
🟡 Idle
0
🔴 Down
Next PM: Jan 15
Chemicals
🧪
8
Total
2
⚠️ Low
2 need reorder
Energy
0
kWh Today
$0
MTD Cost
↓ 5% vs last month
🧪 EFFLUENT SNAPSHOT (7-day trend)
BOD
12.5
42% of limit
TSS
15.2
51% of limit
NH₃
1.8
36% of limit
pH
7.2
OK
E.coli
180
45% of limit
Cl₂
0.8
40% of limit
⚙️ PROCESS HEALTH
MLSS
2,850 mg/L
DO
2.1 mg/L
SVI
125 mL/g
Blanket
1.5 ft
pH
7.2
Temp
72 °F
RAS
50,000 GPD
📈 PROCESS TRENDS (7-day)
MLSS
→ stable
2,850
mg/L
Target: 2,500-3,500 ✓ OK
DO
↑ rising
2.1
mg/L
Target: 2.0-4.0 ✓ OK
pH
→ stable
7.2
units
Target: 6.5-8.5 ✓ OK
FLOW
↓ lower
3.2
MGD
Design: 5.0 MGD 64% cap
🔄 PROCESS FLOW (Extended Aeration)
Influent Headworks Aeration Clarifier Disinfect Effluent
📋 TODAY'S TASKS
📋
DMR Due
14 days
🔧
Next PM
--
🧪
Sampling
Tomorrow
📝
Reports
View All
🎯 QUICK ACTIONS
📝 QUICK NOTES
✓ Saved
0 chars | Auto-saves as you type

🔄 REACTORS

📍 Jump to Section (SBR • MBR • MBBR)
⚙️
Master
⏱️
SBR Cycle
💨
SBR Air
⬇️
Settling
🔬
MBR Flux
MBR Energy
🧫
MBBR
🔗
IFAS

🔄 Advanced Reactor Systems

SBR, MBR, and MBBR calculators and troubleshooting guides

⚙️ Reactor Master Settings

Set master parameters for each reactor type. Values auto-sync to all related calculators.

🔄 SBR Master Parameters

🔬 MBR Master Parameters

🧫 MBBR Master Parameters

🔄 Sequencing Batch Reactor (SBR) Analysis

⏱️ SBR Cycle Time Optimization
Optimize fill, react, settle, decant, and idle phases
💨 SBR Aeration & Oxygen Demand
Calculate oxygen requirements for BOD and nitrogen removal
⬇️ SBR Settling Performance
Analyze settling characteristics and decant performance
📊 SBR Loading Parameters
Calculate F/M ratio, volumetric loading, and MLSS inventory
🚿 SBR Waste Sludge (WAS)
Calculate waste activated sludge requirements
🌿 SBR Nutrient Removal (BNR)
Evaluate nitrogen and phosphorus removal performance
🔧 SBR Troubleshooting Guide
Diagnose common SBR operational issues and get recommended solutions

🔬 Membrane Bioreactor (MBR) Analysis

💧 Membrane Flux & Permeability
Calculate membrane performance and capacity
💨 MBR Aeration (Process + Scour)
Calculate process aeration and membrane scour air requirements
⚡ MBR Energy Analysis
Calculate energy consumption and costs
🧹 MBR Cleaning & Recovery
Track membrane fouling and cleaning effectiveness
📊 MBR Loading & SRT
Calculate loading rates and solids retention time
🔧 MBR Troubleshooting Guide
Diagnose common MBR operational issues

🧫 Moving Bed Biofilm Reactor (MBBR) Analysis

🎯 MBBR Media & Surface Area
Calculate effective biofilm surface area and media requirements
🔬 MBBR BOD Removal Design
Calculate surface area loading rate for BOD removal
💨 MBBR Aeration Requirements
Calculate process and mixing air requirements
🌿 MBBR Nitrification Design
Calculate surface area for ammonia removal
🌊 MBBR Hydraulic Design
Verify hydraulic parameters and retention screens
📈 MBBR Performance Monitoring
Track and evaluate MBBR performance
🔗 IFAS (Integrated Fixed-Film Activated Sludge)
Calculate combined suspended and attached growth
🔧 MBBR Troubleshooting Guide
Diagnose common MBBR/IFAS operational issues and get recommended solutions

📋 COMPLIANCE & LAB

📍 Jump to Section
🎯
All Recs
📈
Benchmark
🔬
Lab Entry
🏛️
Permit
📊
Limits
📝
DMR
⚠️
Risk
📈 Industry Benchmarking GENIUS v9.9.19
COMPOSITE BENCHMARK SCORE
78
/ 100
🏆 Top 15%
vs. similar facilities
CATEGORY PERFORMANCE
🧪 BOD Removal Efficiency 92%
🔬 TSS Removal Efficiency 88%
⚡ Energy Efficiency 68%
🧫 SRT Management 82%
🌀 Settling Performance 85%
📊 PERFORMANCE RADAR
🏭 INDUSTRY COMPARISON
🏆
Your Plant
Score: 78 | Rank: Top 15%
📊
Industry Average
Score: 65 | Median performer
Top Performer
Score: 95 | Best in class
📈
Improvement Potential
+17 points to reach top tier
💡 IMPROVEMENT OPPORTUNITIES
⚡ Energy Efficiency +12 pts possible

Optimize DO setpoints and implement load shifting to reach 80th percentile.

🧫 SRT Optimization +5 pts possible

Fine-tune WAS rates to maintain SRT in 8-12 day optimal range for your loading.

🔬 TSS Performance On track

Current performance is strong. Maintain clarifier operations and monitor SVI.

🎯 Comprehensive Recommendations ALL GENIUS SYSTEMS
CRITICAL
2
Immediate action
HIGH PRIORITY
5
This week
MEDIUM
8
This month
TOTAL SAVINGS
$85K
Annual potential
SOURCES
8
GENIUS systems
📅 30-DAY ACTION PLAN
🚨 WEEK 1: CRITICAL
• Address compliance alerts
• Check equipment warnings
• Review safety issues
⚡ WEEK 2: HIGH PRIORITY
• Optimize DO setpoints
• Schedule PM for Blower #2
• Review chemical dosing
📊 WEEK 3: OPTIMIZATION
• Implement load shifting
• Fine-tune WAS rates
• Update SOP documentation
✅ WEEK 4: VERIFICATION
• Validate improvements
• Update benchmarks
• Prepare monthly report

📋 TCEQ Compliance & Laboratory Module

Permit Tracking, DMR Preparation, Sample Entry & QA/QC

🔬 Laboratory Sample Entry
🏛️ Permit Information
📊 Effluent Limits & Monitoring
Enter your TPDES permit limits. System will track compliance and alert on exceedances.
Parameter Daily Max Weekly Avg Monthly Avg Units Current Value Status
BOD₅ mg/L ✓ OK
TSS mg/L ✓ OK
NH₃-N mg/L ✓ OK
E. coli - MPN/100mL ✓ OK
DO mg/L minimum mg/L ✓ OK
pH - S.U. ✓ OK
Total P mg/L ✓ OK
📝 DMR (Discharge Monitoring Report) Generator

Daily Monitoring Data Entry

DateFlow (MGD)BOD (mg/L)TSS (mg/L)NH3 (mg/L)pHDO (mg/L)
📅 Compliance Calendar & Deadlines

DMR Due

Jan 25, 2025

Monthly Report

Permit Expires

Dec 31, 2027

Renewal Required

Days Compliant

365

This Year

Violations YTD

0

Year to Date

Upcoming Deadlines

📋 December DMR Submission Due: Jan 25, 2025
🔬 Quarterly Biomonitoring (WET Test) Due: Jan 31, 2025
📊 Annual Sludge Report Due: Feb 19, 2025
🏛️ Permit Renewal Application Due: Jun 30, 2027
✅ Laboratory QA/QC Status

Duplicates

98.5%

RPD < 20%

Blanks

Pass

All < MDL

Standards

99.2%

Recovery

Hold Times

100%

Compliance

🏭 PLANT PROFILES

🎛️ Master Settings
Plant settings have moved to the Settings panel
Configure flow rates, aeration, clarifiers, disinfection, and more in one place.
📂 Save & Load Plant Profiles
Save plant configurations for different clients. Load a profile to auto-populate all values instantly.
💾 Save Current Values as New Profile
⚙️ Extended Profile Parameters
Optional details for each plant profile. These are saved with the profile.
📤 Import & Export Profiles
Backup your profiles or transfer them between devices.

💼 BUSINESS

📍 Jump to Section
👥
Clients
📝
Proposals
💵
ROI Calc
🎯
Scenarios
💰
Cost Calc
⏱️
Time Track

💼 Business & Consulting Tools

Client management, proposals, and ROI analysis for your consulting practice

💰 Operations Cost Calculator

Daily Cost

$0.00

Operating

Monthly Cost

$0.00

30-day avg

Annual Cost

$0.00

Projected

Cost per MG

$0.00

$/MG treated
🏭 Plant Information
🧪 Chemical Costs
ChemicalDose (mg/L)Unit Cost ($/lb)Daily Use (lb)Daily CostMonthly Cost
- - -
- - -
- - -
- - -
- - -
Chemical Subtotal $0.00 $0.00
⚡ Energy Costs
EquipmentHP/kWQtyHours/DayDaily kWhDaily CostMonthly Cost
- - -
- - -
- - -
- - -
- - -
Energy Subtotal 0 $0.00 $0.00
🚛 Solids Disposal Costs
Wet Tons per Day-wet tons/day
Loads per Month-loads
Disposal Cost-$/month
Hauling Cost-$/month
Solids Subtotal$0.00/month
📊 Total Cost Summary
Chemical Costs$0.00/month$0.00/year
Energy Costs$0.00/month$0.00/year
Solids Disposal$0.00/month$0.00/year
TOTAL$0.00/month$0.00/year
Cost per MG Treated$0.00/MG

👥 Client & Project Management

Total Clients

0

Active Projects

0

Plants Managed

0

Revenue YTD

$0

➕ Add New Client
📋 Client Database
No clients added yet. Add your first client above!
📁 Projects
No projects yet. Create a project after adding clients.

📝 Proposal Generator

📋 Create New Proposal
🔧 Services & Scope
Select services to include in your proposal. Prices are customizable.
💰 Proposal Summary
Selected Services Subtotal: $0.00
Total Proposal: $0.00
📂 Saved Proposals
No saved proposals yet.

💵 ROI Calculator

📊 Current vs Proposed Scenario

📍 Current State

Current Annual Cost: $0

🎯 After Improvements

Proposed Annual Cost: $0
💰 Investment & Payback Analysis
📈 ROI Results
Enter current and proposed values, then click "Calculate ROI" to see results.
📊 Savings Breakdown
📄 Client Report

⏱️ Time Tracking

⏱️ Active Timer
00:00:00
➕ Manual Time Entry
📊 Time Log

Total Hours

0

Billable Hours

0

Unbilled Amount

$0

Avg Hours/Day

0

No time entries yet. Start the timer or add manual entries above.
📈 Weekly Summary
Mon
0
Tue
0
Wed
0
Thu
0
Fri
0
Sat
0
Sun
0

🤖 AI Enhancement

🧠 Intelligent Process Analysis AI Powered

Let AI analyze your plant data and provide optimization recommendations

🔮 AI Insights & Recommendations
Click an analysis type above to generate AI-powered insights based on your current plant data.
💡 Process Optimization 92% Confidence

Based on current F/M ratio and MLSS levels, consider increasing RAS rate by 8-12% to improve settling and reduce SVI.

⚡ Energy Saving Opportunity 87% Confidence

DO levels are consistently above setpoint. Reducing blower output by 15% during 2AM-6AM could save approximately $2,400/month.

⚠️ Predictive Alert 78% Confidence

SVI trend indicates potential filamentous bulking in 7-10 days. Consider implementing chlorination or nutrient adjustment.

🛠️ Quick AI Tools
📝
AI Report Writer

Generate professional reports from your data

🔍
Smart Troubleshooter

Diagnose issues with intelligent questioning

📈
Process Optimizer

Get real-time optimization suggestions

Compliance Advisor

TCEQ regulation guidance and DMR review

💬 AI Assistant Chat
Hello! I'm your WWTP AI assistant. I can help you with process optimization, troubleshooting, compliance questions, and more. What would you like to discuss?
Analyzing...

📊 Google Sheets Sync

🔗 Connect to Google Sheets

Export plant data to Google Sheets for tracking, reporting, and analysis.

Not Connected

📤 Export Data to Sheet

📊 Daily Operations
🧪 Lab Results
💰 Costs

🔄 Auto-Sync Settings

📋 Service Proposal Generator

📋 Create Professional Proposal

Generate customized service proposals for wastewater consulting engagements.

👤 Client Information

🏭 Facility Information

🛠️ Services Offered

📋 Routine Services
📊 Reports & Compliance
🔧 Special Projects

💰 Pricing

📅 DAILY OPERATIONS

📍 Jump to Section (15 Features)
📋
Checklist
📝
Shift Log
📓🎤
VOICE JOURNAL
Tap to Log • Hands-Free
🚨
Alarms
Energy
🔧
Work Orders
🧪
Lab Samples
📅
Calendar
🎓
Certs
🧴
Chemicals
🌤️
Weather
📈
Flow Total
📊
% Removal
📓
VOICE JOURNAL
🎤 Hands-Free Logging • Auto-Timestamped
NEW

Hands-free logging with voice input. All entries automatically timestamped for documentation.

TAP TO SPEAK
Chrome, Edge, or Safari required
0
Today
0
This Week
0
Total
0
Voice
📓
No journal entries yet
Start logging with text or voice input above
📋 Daily Rounds Checklist
Complete all items during your shift. Progress is saved automatically.

🌅 Morning Checks (6:00 AM)

☀️ Midday Checks (12:00 PM)

🌙 Evening Checks (6:00 PM)

Progress: 0 / 15 (0%)
🧙 Calculation Wizards
Guided step-by-step calculations for common tasks. Perfect for new operators!

⚖️ F/M Ratio Wizard

Calculate Food to Microorganism ratio step by step

5 steps • ~2 min

⏱️ SRT Wizard

Calculate Solids Retention Time with guidance

6 steps • ~3 min

🚿 WAS Rate Wizard

Determine optimal waste activated sludge rate

4 steps • ~2 min

🧪 Chlorine Dose Wizard

Calculate chlorine dosing requirements

4 steps • ~2 min

🧪 SVI Wizard

Calculate Sludge Volume Index step by step

3 steps • ~1 min

📉 BOD Removal Wizard

Calculate BOD removal efficiency

4 steps • ~2 min

🔄 RAS Rate Wizard

Calculate Return Activated Sludge rate

4 steps • ~2 min

⏰ Detention Time Wizard

Calculate hydraulic detention time

3 steps • ~1 min
🎓 Operator Training
Interactive training modules for new operators. Complete all modules to earn certification!

Module 1: Activated Sludge Basics

Understanding biological treatment fundamentals

Module 2: Key Process Parameters

MLSS, SVI, F/M, SRT, and what they mean

Module 3: Troubleshooting Common Problems

Identify and fix operational issues

Training Progress: 0 / 3 modules
📚 Formula Reference
Quick reference guide with all essential wastewater formulas. Click any formula for detailed explanation!
F/M Ratio
F/M = (BOD × Flow × 8.34) / (MLVSS × Volume × 8.34)
ℹ️
SRT (Sludge Retention Time)
SRT = System Solids (lb) / Solids Wasted (lb/day)
ℹ️
SVI (Sludge Volume Index)
SVI = (Settled Volume mL/L × 1000) / MLSS mg/L
ℹ️
BOD Loading
BOD Load (lb/day) = BOD (mg/L) × Flow (MGD) × 8.34
ℹ️
Percent Removal
% Removal = ((In - Out) / In) × 100
ℹ️
Detention Time
DT (hours) = (Volume gal × 24) / (Flow GPD)
ℹ️
Surface Overflow Rate
SOR = Flow (GPD) / Surface Area (sq ft)
ℹ️
CT (Disinfection)
CT = Chlorine Residual (mg/L) × Contact Time (min)
ℹ️
📋 Operator Shift Logbook NEW v9.9.17

Digital shift handoff documentation. Log events and issues for seamless transitions.

Current Shift
Day Shift
DAY

➕ Quick Log

07:15Routine
Shift started. All equipment operational.
🚨 Alarm Management NEW v9.9.17

⚠️ Critical

0

⚡ Warnings

0

✓ Ack'd

0

!
High DO - Basin 1
DO 4.8 mg/L exceeds 3.0 setpoint
⚡ Energy Dashboard NEW v9.9.17

Today

5,240

kWh

Intensity

1,048

kWh/MG

Monthly

$12.4K

Est.

Peak

485

kW
📊 Energy by Process
💨Aeration55%
🔄Pumping25%
🏢Other20%
📝 Work Orders NEW v9.9.17

📋 Open

3

🔄 Progress

2

✅ Done

15

Open

WO-0156: Blower #2 Bearing

John D. | Due: Dec 26
In Progress

WO-0155: Clarifier Inspection

Mike S. | Due: Dec 28

➕ Quick Work Order

🧪 Lab Sample Tracker NEW v9.9.19

📦 Pending

5

🔬 At Lab

3

✓ Complete

47

⚠️ Overdue

0

SAM-2024-1247● At Lab
Dec 22, 08:15
Influent Composite - BOD, TSS, NH₃
📍 Point: INF-01🧊 Temp: 4°C⏱️ Hold: 24hr left
SAM-2024-1246✓ Results Ready
Dec 21, 14:30
Effluent Grab - pH, DO, Chlorine Res.
📍 Point: EFF-01📊 All Pass

➕ Log New Sample

📅 Compliance Calendar NEW v9.9.19

December 2024

Sun
Mon
Tue
Wed
Thu
Fri
Sat

📋 Upcoming Deadlines

DMR Submission
Dec 28, 2024
5 days
Monthly BOD/TSS Sampling
Dec 30, 2024
7 days
Quarterly Biosolids Report
Jan 15, 2025
23 days
🎓 Operator Certifications NEW v9.9.19

✓ Valid

4

⚠️ Expiring

1

📚 CEUs

24

A
John Smith
Class A WWTP Operator • License #WW-12345
Valid
Expires: Mar 15, 2025 CEUs: 18/20 required
B
Mike Johnson
Class B WWTP Operator • License #WW-23456
Expiring Soon
Expires: Jan 30, 2025 CEUs: 12/15 required
🧪 Chemical Inventory NEW v9.9.19
⚠️
Low Stock Alert
Sodium Hypochlorite below reorder point (15%)
🧪
Polymer (Cationic) 78%
455 lbs remainingEst. 23 days
💧
Ferric Chloride 42%
320 gal remainingEst. 12 days
🧴
Sodium Hypochlorite 15%
120 gal remainingEst. 4 days ⚠️

📦 Log Delivery / Usage

🌤️ Weather & Operations Impact NEW v9.9.19
☀️
72°F
Sunny, Clear Skies
📍 Houston, TX
💧 45%
💨 8 mph
🌧️ 0%
Mon
☀️
74°
Tue
71°
Wed
🌧️
65°
Thu
🌧️
62°
Fri
68°
🌧️
Rain Expected Wed-Thu
Expected: 1.5-2.0 inches. Prepare for I/I increase. Consider reducing WAS rates preemptively.
Est. Flow Impact
+15%
Temp Effect on Bio
Optimal
Storm Prep Status
Ready

⚙️ PROCESS CONTROL

📍 Jump to Section
🎯
Optimizer
🧮
Adv Calcs
🎛️
Master Settings
📥
Loading
🧫
Sludge
💨
Oxygen
📊
Calcs
🧪
Chemicals
🌊
Hydraulics
📈
SPC Charts
🔬
Lab Calcs
📈
Flow Total
📊
% Removal
🎯 Process Optimization Advisor GENIUS v9.9.19
OPTIMIZATION SCORE
70
/ 100
GOOD
ANNUAL SAVINGS
💰
$48K
potential/year
RECOMMENDATIONS
2
HIGH
3
MED
1
LOW
6 total actions
QUICK WINS
3
implement today
📊 ANALYSIS AREAS
💨
Aeration
Analyzing...
$12K/yr
85%
🧫
Solids Mgmt
Analyzing...
$8K/yr
72%
🌿
Nutrient Removal
Analyzing...
$6K/yr
88%
🧪
Chemical Dosing
Analyzing...
$15K/yr
58%
Energy Efficiency
Analyzing...
$7K/yr
75%
🎯 PRIORITIZED RECOMMENDATIONS
📋 Implementation Progress
0 of 6 completed
Realized Savings: $0 Remaining: $48K
🧮 Advanced Calculator Suite 12 NEW TOOLS
💨
Blower
⚗️
Alkalinity
🌀
SVI
🧪
Chlorine
🔄
Pump
🔀
Flow Split
🧫
Polymer
🫧
Aeration
↩️
Return Rate
⚖️
Loading
🚛
Sludge
Energy
💨 Blower Air Requirement SCFM
Air Required
2,083
SCFM
HP Estimate
75
Horsepower
⚗️ Alkalinity for Nitrification lbs/day
Alk Consumed
1,840
lbs/day as CaCO₃
Soda Ash Needed
485
lbs/day
🌀 SVI & Settleability Analysis mL/g
SVI
83
mL/g
SDI
1.20
g/100mL
Status
GOOD
Settling
✓ Normal settling characteristics. Maintain current operations.
🧪 Chlorine Dosing Calculator lbs/day
Chlorine Required
117
lbs Cl₂/day
Solution Feed Rate
112
GPD
🔄 Pump Flow & Head Calculator GPM/HP
Water HP
4.4
Brake HP
6.3
Motor HP
7.5
🔀 Flow Split Calculator % Split
Unit 1
2.0
MGD (40%)
Unit 2
1.75
MGD (35%)
Unit 3
1.25
MGD (25%)
🧫 Polymer Dosing Calculator lbs/DT
Dry Polymer
27
lbs/day
Solution Feed
648
GPD
🫧 Aeration Basin Sizing MG
Total Volume
1.17
MG
Each Basin
0.58
MG
Surface Area
10,400
sq ft each
↩️ RAS/WAS Return Rate %
RAS Ratio
60%
RAS Flow
2.1
MGD
Recycle
1,458
GPM
⚖️ Organic Loading Rates lbs/day
BOD Load
5,838
lbs/day
TSS Load
6,422
lbs/day
OLR
58
lbs BOD/1000 cf
🚛 Sludge Production Estimate lbs/day
Dry Solids
3,503
lbs/day
Wet Cake
19,461
lbs/day
Weekly Loads
3.4
@ 20 tons
⚡ Energy Cost Calculator $/day
Daily kWh
1,656
Daily Cost
$149
Annual Cost
$54K
🔬 Advanced Calculator Suite II 10 NEW TOOLS
🧬
Nutrient
🔥
Digester Gas
📊
BOD/COD
🌊
Hydraulics
🌡️
Temp Corr
🔵
Nitrogen
🟣
Phosphorus
⏱️
Detention
💨
Velocity
Methane
🧬 Nutrient Removal Efficiency BNR
TN Removal
80%
Excellent
TP Removal
89%
Excellent
✓ BNR system operating at optimal efficiency
🔥 Digester Gas Production cf/day
Total Gas
75,000
cf/day
BTU/day
30.4M
million
Power Gen
130
kW equiv
📊 BOD/COD Ratio Analysis RATIO
BOD/COD
0.44
Biodegradable
BOD Removal
95%
COD Removal
91%
✓ Typical municipal wastewater - readily biodegradable
🌊 Pipe Hydraulics (Hazen-Williams) ft/s
Velocity
5.67
ft/sec
Head Loss
4.82
ft
HL/100ft
0.48
ft
✓ Velocity within acceptable range (2-10 ft/s)
🌡️ Temperature Correction Factors θ
BOD Rate @ Temp
0.40
per day
Nitrif. Rate @ Temp
1.22
mg/L/hr
BOD θ Factor
0.79
Nitrif. θ Factor
0.61
🔵 Nitrogen Mass Balance lbs/day
TKN Load In
1,022
lbs/day
N Denitrified
744
lbs/day
Eff. TN
9.5
mg/L
🟣 Chemical Phosphorus Removal Alum/FeCl₃
Alum Required
320
lbs/day as Al
Ferric Required
640
lbs/day as Fe
Alum Solution (48%)
65 GPD
Ferric Solution (40%)
128 GPD
⏱️ Detention Time Calculator hrs
HRT
3.43
hours
Total Volume
1.0
MG
Surface Area
5,568
sq ft each
💨 Channel/Pipe Velocity ft/s
Velocity
0.67
ft/sec
Cross-Section
12
sq ft
Contact Time
75
seconds
✓ Velocity OK for channel flow (min 1.0 ft/s recommended)
⚡ Methane Energy Potential kWh
Methane BTU
48.8M
BTU/day
Elec. Potential
5,000
kWh/day
Daily Value
$450
/day
Annual Value: $164,250
🔬 Lab & Process Calculations 8 Calcs + Help

Standard Methods lab calculations with built-in training guides. Click ? on any calculator for regulatory standards, best practices, and troubleshooting.

📊 Total Suspended Solids (TSS)

SM 2540 D - Dried at 103-105°C

TSS Result
-- mg/L
Formula: TSS = ((Final - Tare) × 1,000) / Volume (mL)
💡 Typical Ranges: Influent: 150-350 mg/L | Effluent: 5-30 mg/L | MLSS: 2,000-4,000 mg/L
🎛️ Master Settings
Design Flow
-- MGD
Aeration Vol
-- MG
Clarifier Area
-- sq ft
Target DO
-- mg/L
📥 Influent Loading Parameters
💧
📊 Loading Results & Analysis
Parameter Value Unit 7-Day Avg Trend Status
BOD Load - lb/d - - -
TSS Load - lb/d - - -
TKN Load - lb/d - - -
TP Load - lb/d - - -
COD Load - lb/d - - -
Organic Loading Rate
0.42
lb BOD/lb MLVSS/d
Volumetric Loading
58.3
lb BOD/1000 ft³/d
BOD:N:P Ratio
100:20:4
Actual
🧫 Sludge Management
Sludge management parameters for activated sludge process control.
🧫 Activated Sludge Parameters
📊 Sludge Results
Parameter Value Unit Status
F/M Ratio - lb BOD/lb MLVSS/d -
MCRT (Sludge Age) - days -
SVI - mL/g -
MLSS Inventory - lbs -
WAS Solids - lbs/day -
RAS Rate - % of Q -
💨 Oxygen & Aeration
💨 Oxygen Requirements
O₂ Required
-
lb O₂/d
Peak Demand
-
lb O₂/hr
Airflow
-
CFM
🧮 Enhanced Calculators Auto-Calculate
F/M Ratio
0.25 lb BOD/lb MLVSS/day
✓ Optimal
Target: 0.2 - 0.5
SVI
120 mL/g
✓ Good Settling
Target: 80 - 150
SRT (Sludge Age)
10 days
✓ Optimal
Target: 5 - 15 days
MLSS Inventory
25,000
lbs
✓ Normal
Stable

⏱️ Detention Time Calculator Auto

MG
MGD
Detention Time
6.86
hours
HRT = (Volume × 24) / Flow = (1.0 MG × 24) / 3.5 MGD = 6.86 hrs

📐 Surface Overflow Rate Auto

MGD
ft
Surface Overflow Rate
348
GPD/sq ft
✓ Good (300-800 typical)
SOR = Flow / Area = 3,500,000 GPD / 10,053 sq ft = 348 GPD/ft²

🌊 Weir Loading Rate Auto

MGD
ft
Weir Loading
7,000
GPD/ft
✓ Good (<10,000 typical)
WLR = Flow / Weir Length = 3,500,000 / 500 = 7,000 GPD/ft

💨 Oxygen Requirement Auto

Oxygen Required
8,320
lb O₂/day
347 lb/hr
O₂ = 1.5×BOD + 4.6×TKN = 1.5×5000 + 4.6×400 = 8,320 lb/d

💰 Chemical Cost Calculator Auto

Daily Chemical Cost
$365
per day
$10,950/month • $133,225/year
lbs/d = Flow × Dose × 8.34 = 3.5 × 50 × 8.34 = 1,460 lb/d × $0.25 = $365/d

📅 SRT / Sludge Age Auto

Sludge Retention Time
15.0
days
✓ Good for nitrification
SRT = (Vol × MLSS × 8.34) / (WAS × WAS_TSS × 8.34)
📈 Statistical Process Control (SPC) Charts NEW v9.9.16

Monitor process stability with control charts. UCL/LCL automatically calculated from your data. Out-of-control points trigger alerts.

📊 DO Control Chart

✓ In Control
UCL (+3σ)
3.2
UWL (+2σ)
2.9
CL (Mean)
2.3
LWL (-2σ)
1.7
LCL (-3σ)
1.4
Std Dev (σ)
0.30
Data Points
30
Out of Control
0
Cp Index
1.33
Cpk Index
1.21

📝 Add Data Point

⚠️ Western Electric Rules (Out-of-Control Detection)

Rule 1: 1 point beyond 3σ (UCL/LCL)
✓ Pass
Rule 2: 2 of 3 points beyond 2σ (same side)
✓ Pass
Rule 3: 4 of 5 points beyond 1σ (same side)
✓ Pass
Rule 4: 8 consecutive points on same side of CL
✓ Pass

💨 AERATION & ENERGY

📍 Jump to Section
💨
Oxygen Transfer
🌀
Blower
Energy

💨 Aeration & Energy

Oxygen transfer, blower performance, and energy optimization

💨 Oxygen Transfer Efficiency (OTE)
Calculate actual oxygen transfer rate from standard conditions
Theta Correction-
AOTR-lb O₂/hr
Transfer Efficiency-%
🌀 Blower Performance
Brake HP-HP
Motor HP (w/ SF)-HP
Power Draw-kW
⚡ Energy Cost Analysis

Daily kWh

-

Monthly Cost

-

Annual Cost

-

kWh/MG

-

🧪 CHEMICAL SYSTEMS

📍 Jump to Calculator
🎯
P Removal
☣️
Chlorine
⏱️
CT Calc
💊
Polymer
⚗️
Alkalinity
🧪
Dechlor
🔶
Coagulant
⚖️
pH Adjust
🌱
Carbon
👃
Odor
🧫
Dilution
📦
Inventory

⚗️ Chemical Systems

Chemical feed optimization, dosing calculations, and disinfection

🎯 Chemical Feed Optimizer
Optimize coagulant/flocculant dosing for phosphorus removal

Me:P Ratio

-

Dose (mg/L)

-

Feed Rate (gpd)

-

Daily Cost

-

☣️ Chlorine Disinfection
Cl₂ Required-lb/day
Solution Feed-gpd
CT Value-mg·min/L
⏱️ CT Disinfection Calculator NEW v9.9.29

Calculate CT (Concentration × Time) for disinfection compliance. CT values based on EPA Guidance Manual.

*Cryptosporidium requires UV or ozone; chlorine CT shown for reference only
CT Achieved
15.0
mg·min/L
CT Required
104
mg·min/L
CT Ratio
0.14
achieved/required
Status
❌ FAIL
Increase residual or time
📊 Log Inactivation Achieved (at current CT)
Giardia
0.4
log
Virus
3.8
log
E. coli
5.0+
log
Crypto*
<0.5
log
💡 To Achieve Compliance:
Increase chlorine residual to 1.7 mg/L OR increase contact time to 208 minutes
📋 CT Reference Table (Free Chlorine at 20°C, pH 7)
Pathogen 1-log 2-log 3-log 4-log
Giardia lamblia3569104138
Viruses1234
E. coli0.030.060.090.12
Cryptosporidium*N/AN/AN/AN/A
*Cryptosporidium is resistant to chlorine. Use UV (40 mJ/cm²) or ozone for inactivation.
🧫 Jar Test Optimizer Coagulant & Polymer

Record jar test results to determine optimal chemical doses and costs.

⚙️ Test Setup

1% = 10,000 mg/L
💉 Syringe Dose Calculator

🧪 Jar Test Results (6 Jars)

Enter coagulant dose and results for each jar. Leave unused jars blank.
Jar # Coag Dose
(mg/L)
Polymer
(mg/L)
Flash Mix
pH
Floc Size
(1-5)
Settle Time
(min)
Final Turb
(NTU)
Final pH
1
2
3
4
5
6

📚 Jar Test Reference Guide

Floc Size Scale:
1 = Pin floc (poor)
2 = Small, slow settling
3 = Medium, good
4 = Large, fast settling
5 = Extra large, excellent
Typical Doses:
Alum: 10-50 mg/L
Ferric: 10-50 mg/L
PAC: 5-30 mg/L
Polymer: 0.5-3 mg/L
Optimal pH Ranges:
Alum: 5.5-7.5
Ferric: 4.0-9.0
PAC: 5.0-8.5
Lime: >10.5
💊 Polymer Dosing
Dry Tons/Day-DT/day
Polymer Required-lb/day
Solution Feed-gpm
⚗️ Alkalinity Adjustment
Alk Increase Needed-mg/L
Chemical Required-lb/day
Solution Feed-gpd
📦 Chemical Inventory Tracker Track & Alert

Track chemical inventory levels, usage rates, and receive low-stock alerts.

Chemical Current (gal) Daily Use Days Left Reorder Pt Status Actions

⚠️ Low Stock

0

📦 Total Items

0

💰 Inventory Value

$0

📅 Avg Days Supply

0

🔧 MAINTENANCE

Equipment tracking, PM schedules, runtime hours, and calibration management

📍 Jump to Section
🔧
PM Tracker
📐
Calibration
📦
Spare Parts
📝
Work Orders
🔧 Equipment PM Tracker NEW v9.9.16

Track equipment runtime hours, maintenance schedules, and costs. Get alerts before PM is due.

⚠️ Overdue

0

📅 Due Soon (7d)

0

✓ Up to Date

0

💰 YTD Cost

$0

Equipment Category Runtime (hrs) Last PM Interval Next Due Status Actions

📜 Recent Maintenance History

📋
No maintenance history yet
🔬 Calibration Tracking
InstrumentLocationLast CalDueStatus
DO Probe #1Aeration Basin2024-11-202024-12-20OK
pH AnalyzerEffluent2024-11-252024-12-25OK
Flow MeterInfluent2024-06-012024-12-01Overdue
TurbidityEffluent2024-11-012024-12-01Due Soon
🛠️ Work Order Log
WO-2024-142In Progress
Blower #2 bearing replacement
Assigned: John D. | Due: 12/10/2024
WO-2024-143Urgent
UV lamp replacement - Bank A
Assigned: Mike S. | Due: 12/08/2024
📏 Instrument Calibration Tracker NEW v9.9.27

Track instrument calibrations, due dates, and compliance. Get alerts before calibrations expire.

⚠️ Overdue

1

📅 Due 7 Days

3

✓ Current

12

📊 Compliance

94%

Instrument Location Last Cal Next Due Freq Status Action
📡 ONLINE PROCESS ANALYZERS
DO Probe #1
Hach LDO2
Aeration Basin 1 12/01/24 12/15/24 14 days OVERDUE
DO Probe #2
Hach LDO2
Aeration Basin 2 12/08/24 12/22/24 14 days OVERDUE
pH Probe - Influent
Hach pHD sc
Influent Structure 12/20/24 12/27/24 7 days DUE TODAY
pH Probe - Effluent
Hach pHD sc
Effluent 12/22/24 12/29/24 7 days DUE SOON
ORP Probe
Hach DRD8E
Anoxic Zone 12/15/24 01/15/25 30 days CURRENT
TSS Analyzer - MLSS
Hach Solitax sc
Aeration Basin 12/10/24 01/10/25 30 days CURRENT
TSS Analyzer - RAS
Hach Solitax sc
RAS Line 12/10/24 01/10/25 30 days CURRENT
Turbidity - Effluent
Hach TU5300 sc
Effluent 12/15/24 01/15/25 30 days CURRENT
Chlorine Analyzer
Hach CL17sc
Disinfection 12/10/24 01/10/25 30 days CURRENT
Ammonia Analyzer
Hach Amtax sc
Effluent 12/01/24 01/01/25 30 days CURRENT
📊 FLOW METERS
Influent Flow Meter
Endress+Hauser Promag
Influent 06/15/24 06/15/25 Annual CURRENT
Effluent Flow Meter
Endress+Hauser Promag
Effluent 06/15/24 06/15/25 Annual CURRENT
RAS Flow Meter
Endress+Hauser Promag
RAS Pump Station 06/15/24 06/15/25 Annual CURRENT
WAS Flow Meter
Endress+Hauser Promag
WAS Pump Station 06/15/24 06/15/25 Annual CURRENT
📏 LEVEL INSTRUMENTS
Wet Well Level
Siemens Ultrasonic
Lift Station 09/01/24 03/01/25 6 months CURRENT
Clarifier Blanket
Hach Sludge Blanket
Secondary Clarifier 11/01/24 02/01/25 Quarterly CURRENT
🔬 BENCHTOP LAB EQUIPMENT
Benchtop pH Meter
Hach HQ440d
Laboratory 12/26/24 12/27/24 Daily DUE TODAY
Benchtop DO Meter
YSI ProODO
Laboratory 12/20/24 12/27/24 Weekly DUE TODAY
Benchtop Conductivity
Hach HQ440d
Laboratory 12/01/24 01/01/25 Monthly CURRENT
Turbidimeter
Hach 2100Q
Laboratory 12/15/24 01/15/25 Monthly CURRENT
Spectrophotometer
Hach DR3900
Laboratory 12/01/24 01/01/25 Monthly CURRENT
Analytical Balance
Mettler Toledo
Laboratory 06/01/24 06/01/25 Annual CURRENT
BOD Incubator Thermo
NIST Traceable
Laboratory 12/01/24 01/01/25 Monthly CURRENT
Oven Thermometer
NIST Traceable
Laboratory 12/01/24 01/01/25 Monthly CURRENT
Pipettes (Set of 4)
Eppendorf
Laboratory 06/01/24 06/01/25 Annual CURRENT
⚠️ SAFETY / CONFINED SPACE
4-Gas Monitor #1
MSA Altair 4XR
Operations 12/20/24 12/30/24 Monthly DUE SOON
4-Gas Monitor #2
MSA Altair 4XR
Operations 12/20/24 12/30/24 Monthly DUE SOON
H₂S Area Monitor
RKI GD-70D
Headworks 09/01/24 03/01/25 6 months CURRENT
Chlorine Area Monitor
Honeywell Manning
Disinfection Bldg 09/01/24 03/01/25 6 months CURRENT

📋 Recent Calibration Log

pH Probe #1 calibrated - 2-point (4.0, 7.0) 12/20/24 08:15 - J. Smith
DO Probe #1 calibrated - Zero/Span 12/01/24 07:30 - M. Johnson
Turbidity Meter verified - 20 NTU standard 12/15/24 14:00 - J. Smith

📑 REPORTS

📍 Jump to Section
📑
Executive
🏢
Branding
📄
Report Type
👁️
Preview
📤
Export
📑 Executive Report Generator GENIUS v9.9.19
REPORT DATE
${new Date().toLocaleDateString()}
Auto-generated
PLANT STATUS
OPTIMAL
Health: 87%
DATA SOURCES
8
GENIUS systems
LAST GENERATED
Never
Click Generate
📋 REPORT SECTIONS (Click to toggle)
👁️ REPORT PREVIEW
📑
Click ⚡ Generate to create your executive report
Report will pull data from all 8 GENIUS systems
📤 EXPORT OPTIONS
📅 SCHEDULED REPORTS
Coming Soon
🏢 Company Branding
📄 Select Report Type
📅

Daily Operations Report

Date, plant values, checklist status, daily notes, operator signature

⚙️

Process Summary Report

All calculator results, status indicators, formulas used

🏭

Client Visit Report

Plant profile, findings, recommendations, action items

🧮

Calculation Report

All inputs, outputs, formulas, with professional formatting

📋 Report Configuration

🏭 Plant Information

📝 Notes & Comments

📤 Quick Export

📐 HYDRAULICS

📍 Jump to Section (15+ Calculators)
🧫
OLR
⚖️
F/M
🧪
SVI
☣️
Chlorine
💊
Polymer
🔶
Coagulant
⚗️
pH Adjust
🌱
Carbon
👃
Odor
🧫
Dilution
🧮 Process Calculators
🧫 Organic Loading Rate (OLR)
BOD Loading-lb/day
Organic Loading Rate-lb BOD/1000 cf/day
⚖️ F/M Ratio (Food to Microorganism)
MLVSS Mass-lb
F/M Ratio-lb BOD/lb MLVSS/day
Status-
⏱️ Sludge Retention Time (SRT)
System Solids-lb
Solids Wasted-lb/day
SRT (Sludge Age)-days
Status-
🕐 Hydraulic Detention Time (HRT)
Detention Time-hours
Status-
📉 BOD Removal Efficiency
Removal Efficiency: - %
BOD Removed-mg/L
Removal Efficiency-%
Status-
🧪 Sludge Volume Index (SVI)
SVI-mL/g
Settling Quality-
🚿 Waste Activated Sludge (WAS)
Required WAS Flow-GPD
Solids Wasted-lb/day
🔄 Return Activated Sludge (RAS)
RAS Ratio-%
RAS Flow-MGD
☣️ Chlorine Dosing
Chlorine Required-lb/day
Solution (12.5%)-gal/day
💊 Polymer Dosing
Dry Solids-lb/hr
Polymer Required-lb/hr
🧪 Dechlorination (Sulfite)
💡 Dechlorination Info: Sodium bisulfite (SBS) or sulfur dioxide removes chlorine residual before discharge. Typical ratio: 1.0-1.5 mg SBS per 1.0 mg Cl₂. Adjust SG and Strength from your SDS.
SBS Required (100%)-lb/day
Solution Feed Rate-gal/day
Daily Cost-$/day
🔶 Coagulant Dosing (Ferric/Alum)
💡 Coagulation: Ferric chloride and alum are used for phosphorus removal and TSS reduction. Adjust SG and Strength from your SDS.
Chemical Required-lb/day
Solution Feed Rate-gal/day
Feed Pump Setting-gal/hr
Daily Cost-$/day
⚖️ pH Adjustment
💡 pH Control: Caustic (NaOH) raises pH. Sulfuric acid (H₂SO₄) or CO₂ lowers pH. Adjust SG and Strength from your SDS.
Estimated Chemical-lb/day
Solution Feed-gal/day
Daily Cost-$/day
Notes-
🌱 Carbon Source Dosing
💡 Denitrification Carbon: External carbon needed when BOD:N ratio is too low. Adjust SG and C:N ratio from your SDS.
N Load Removed-lb N/day
Carbon Required-lb/day
Feed Rate-gal/day
Daily Cost-$/day
👃 Odor Control Dosing
💡 H₂S Control: Ferrous/ferric salts, nitrate, or oxidizers control hydrogen sulfide. Adjust SG and Strength from your SDS.
Chemical Required-lb/day
Feed Rate-gal/day
Daily Cost-$/day
🧫 Chemical Dilution Calculator
💡 Dilution Formula: C₁V₁ = C₂V₂ (Concentration × Volume of stock = Concentration × Volume of diluted)
Stock Solution Needed-gallons
Water to Add-gallons
Dilution Ratio-: 1
⛽ Pumping & Hydraulics
Water Horsepower-HP
Brake Horsepower-HP
Motor Horsepower-HP
Power Draw-kW
⚗️ Alkalinity Requirements
Alkalinity Consumed-mg/L as CaCO3
Daily Alk Required-lb/day
🌊 Surface Overflow Rate (SOR)
Surface Overflow Rate-gpd/sq ft-
Status-
🔄 Weir Overflow Rate (WOR)
Weir Overflow Rate-gpd/ft-
Status-
📊 Solids Loading Rate (SLR)
Solids Loading Rate-lb/sq ft/day-
Status-
⏱️ Mean Cell Residence Time (MCRT)
System Solids-lb
Solids Wasted-lb/day
MCRT-days
Status-
💨 Oxygen Uptake Rate (OUR)
OUR-mg/L/hr
SOUR-mg O2/g MLVSS/hr
Status-
📅 Sludge Age Calculator (Multiple Methods) 5 Methods

Calculate SRT/MCRT using different methods. Compare results to verify accuracy.

📊 System Parameters

📊 Method 1: Standard SRT

SRT = Total System Solids ÷ Solids Wasted per Day

📚 SRT Guidelines by Process Type

Process TypeSRT (days)F/M (lb/lb/d)Notes
High-Rate AS2-40.4-1.0BOD removal only
Conventional AS4-80.2-0.4Good BOD removal
Nitrification8-150.1-0.2Complete nitrification
Extended Aeration15-300.05-0.1Low sludge production
MBR Systems15-500.05-0.15High MLSS operation
🌡️ Min SRT for Nitrification:
20°C: 4-5 days
15°C: 6-8 days
10°C: 10-15 days
5°C: 20+ days
⚠️ Common Issues:
SRT too low: Poor nitrification
SRT too high: Pin floc, high DO demand
Variable SRT: Inconsistent performance
🧪 Ammonia/TKN Removal
NH3-N Removed-mg/L
Removal Efficiency-%
Mass Removed-lb/day
Alkalinity Consumed-lb/day as CaCO3
🔬 Phosphorus Removal
TP Removed-mg/L
Removal Efficiency-%
Chemical Dose Required-lb/day
Molar Ratio-mol/mol P
🌿 Nutrient Balance Calculator BNR Analysis

Complete nitrogen and phosphorus balance through the treatment process.

📥 Influent Characteristics

⚙️ Process Configuration

🎯 Effluent Targets/Limits

⚗️ Chemical Addition (if needed)

📚 Nutrient Removal Guidelines

ProcessTN AchievableTP AchievableKey Requirements
Conventional25-35 mg/L4-6 mg/LBOD removal only
Nitrification20-30 mg/L4-6 mg/LSRT >8d @ 20°C
Nit-Denit8-12 mg/L4-6 mg/LAnoxic zone, carbon
BNR (MLE)6-10 mg/L1-2 mg/LBio-P + denit
Advanced BNR3-5 mg/L0.1-0.5 mg/LMultiple stages, chem-P
N Stoichiometry:
Nitrification: 4.6 lb O₂/lb N
Denitrification: 2.9 lb BOD/lb N
Alkalinity: 7.1 lb CaCO₃/lb N (nit)
Recovery: 3.6 lb CaCO₃/lb N (denit)
P Stoichiometry:
Bio-P uptake: 0.01-0.02 lb P/lb BOD
Alum: 10:1 Al:P molar ratio
Ferric: 2:1 Fe:P molar ratio
Sludge P content: 2-7% in EBPR
🧫 TSS/VSS Removal Efficiency
TSS Removal-%
VSS Removal-%
VSS/TSS Ratio (In)-
VSS/TSS Ratio (Out)-
⚙️ Grit Chamber Sizing
Volume Required-cu ft
Length Required-ft
Surface Area-sq ft
Horizontal Velocity-ft/min
🔥 Anaerobic Digester Loading
VS Loading-lb VS/day
Volumetric Loading-lb VS/cu ft/day
HRT-days
Status-
>
🔬 MLSS/MLVSS Calculator
MLVSS-mg/L
Total Solids-lb
Volatile Solids-lb
🌊 Clarifier Loading Rates
Surface Overflow Rate-gpd/sq ft
Weir Overflow Rate-gpd/ft
Solids Loading-lb/sq ft/day
Status-
💨 Oxygen Transfer Efficiency
Field OTE-%
O2 Delivered-lb O2/hr
SOTR-lb O2/hr
🔥 Digester Gas Production
Total Gas-cf/day
Methane Volume-cf/day
Energy Value-BTU/day
Power Potential-kW
🗜️ Belt Press / Centrifuge Calculator Dewatering

Comprehensive dewatering analysis for belt filter press and centrifuge operations.

⚙️ Equipment Configuration

📥 Feed Sludge Characteristics

📊 Performance Parameters

⚗️ Polymer Conditioning

🚛 Disposal

📚 Dewatering Equipment Guidelines

ParameterBelt PressCentrifugeScrew Press
Cake Solids (%)18-2520-3015-25
Capture (%)90-9890-9890-95
Polymer (lb/DT)8-1515-255-10
Energy (kWh/DT)10-2030-605-15
Wash WaterHighNoneLow
Typical Cake Solids:
Primary: 28-34%
WAS: 15-20%
Mixed: 20-28%
Digested: 22-30%
Polymer Dose Range:
Primary: 3-8 lb/DT
WAS: 15-25 lb/DT
Digested: 10-18 lb/DT
Mixed: 8-15 lb/DT
💨 Blower Air Requirements
Air Required-SCFM
Blower HP (est)-HP
Annual Energy-kWh/yr
☀️ UV Disinfection Calculator Comprehensive

Design and evaluate UV disinfection systems for various applications.

⚙️ System Configuration

💧 Water Quality Parameters

☢️ Dose Requirements

💰 Operating Costs

📚 UV Dose Guidelines

PathogenLog ReductionDose (mJ/cm²)
E. coli4-log20-25
Fecal Coliform4-log30-40
Giardia3-log11
Cryptosporidium3-log12
Virus (Adeno)4-log186
CA Title 22 Reuse5-log virus100-140
UVT Guidelines:
Secondary: 55-65%
Tertiary: 65-75%
Reuse: 70-85%
Drinking: >90%
Lamp Types:
LP: 254nm, efficient, longer life
LPHO: Higher output, fewer lamps
MP: Broad spectrum, compact
🔄 Sludge Thickening
Dry Solids In-lb/hr
Thickened Flow-GPM
Solids Captured-lb/hr
Volume Reduction-%
⚖️ Equalization Basin Sizing
Storage Volume-MG
Storage Volume-gallons
Peak-to-Avg Ratio-
🌧️ Wet Weather & I/I Calculator Storm Analysis

Analyze wet weather impacts, I&I contribution, and treatment capacity during storm events.

📊 Baseline (Dry Weather) Conditions

🌧️ Storm Event Data

🏭 Treatment Capacity

📚 Wet Weather Guidelines

ParameterTypical RangeConcern Level
Peak/Avg Flow Ratio2.0-3.0>4.0 = High I&I
I&I Rate (gpd/mi)2,000-5,000>10,000 = Excessive
I&I Rate (gpd/capita)20-50>100 = Excessive
RDII (gal/in/acre)500-2,000>5,000 = High
Peaking Factor2.5-3.5>5.0 = I&I issues
I&I Sources:
Inflow: Direct connections
- Roof drains, sump pumps
- Cross-connections
Infiltration: Groundwater
- Cracked pipes, joints
- Manholes, laterals
Treatment Impacts:
- Diluted influent (low BOD)
- Hydraulic overload
- Solids washout risk
- Reduced SRT
- Nitrification loss
- SSO/bypass risk
🧪 Chemical Feed Rate
Chemical (dry)-lb/day
Solution Volume-gal/day
Feed Rate-gal/hr
Feed Rate-mL/min
🗑️ Screenings & Grit Estimation
Screenings-cu ft/day
Screenings-cu yd/month
Grit Volume-cu ft/day
Grit-cu yd/month
🏗️ Primary Clarifier Performance
Est. BOD Removal-%
Est. TSS Removal-%
Effluent BOD-mg/L
Effluent TSS-mg/L
🔄 Trickling Filter Loading
Organic Loading-lb BOD/1000 cf/day
Hydraulic Loading-gpd/sq ft
Est. BOD Removal-%
🌱 Biosolids Land Application
Total N-lb/yr
Available N-lb/yr
Land Required-acres
Application Rate-dry tons/acre
📐 Hydraulic Profile Calculator
Calculate water surface elevations (WSE) through treatment units. Enter starting elevation and head losses to generate the hydraulic grade line.

📍 Starting Conditions

🏭 Unit Process Head Losses (ft)

Enter head loss across each unit at peak flow. Use 0 for units not present.

Preliminary Treatment
Primary Treatment
Secondary Treatment
Tertiary/Effluent
🔧 Pipe Headloss (Hazen-Williams)
Calculate friction headloss in pipes using Hazen-Williams equation
Velocity-ft/s
Friction Loss-ft
Fitting Losses-ft
Total Head Loss-ft
Head Loss per 100 ft-ft/100 ft
🌊 Weir & Orifice Head Loss
Calculate head over weirs and through orifices
Rectangular Weir
Head over Weir: - ft
Circular Orifice
Head Required: - ft
〰️ Open Channel Flow (Manning's)
Calculate flow depth and velocity in open channels using Manning's equation
Normal Depth-ft
Flow Area-sq ft
Wetted Perimeter-ft
Hydraulic Radius-ft
Velocity-ft/s
Froude Number-
⚗️ Chemical Feed Rate Optimizer
Optimize chemical dosing based on target removal and real-time conditions

📊 Current Conditions

💊 Chemical Selection

🌊 Equalization Basin Sizing
Size EQ basins for flow and load equalization based on diurnal patterns
📈 Hourly Flow Pattern (24-hr)

Enter flows as % of average (default pattern loaded)

⚠️ Violation Risk Predictor
Predict probability of permit violations based on current performance and variability

📋 Permit Limits

📊 Current Performance (30-day)

⚖️ Mass Balance Calculator
Calculate mass balances for BOD, TSS, nitrogen, and phosphorus through the treatment process

📥 Influent Conditions

Primary Treatment
Secondary Treatment
Tertiary/Chemical
💨 Oxygen Transfer Efficiency (OTE) Calculator
Calculate actual oxygen transfer rate (AOTR) from standard conditions and evaluate aeration efficiency

🔧 System Parameters

🌡️ Process Conditions

🔄 Pump Station Calculator Lift Station

Design and analyze pump stations: wet well sizing, pump selection, cycle times, and energy costs.

📊 Design Flows

🪣 Wet Well Design

⚙️ Pump Configuration

💰 Energy & Costs

📚 Pump Station Design Guidelines

ParameterTypical RangeNotes
Min Cycle Time5-10 minPrevents motor overheating
Max Starts/Hour6-12Check motor rating
Detention Time<30 minPrevents septicity
Min Velocity2-3 fpsPrevents settling
VFD Savings20-50%Affinity laws (cube of speed)
🔬 Membrane Calculator (MBR/RO/UF) Filtration

Design and analyze membrane systems: MBR, UF, MF, RO, and NF applications.

⚙️ System Configuration

📈 Operating Parameters

🔧 Module Specifications

💰 Operating Costs

📚 Membrane Design Guidelines

TypeTypical Flux (GFD)TMP (psi)RecoveryLife (yrs)
MBR10-201-5N/A7-10
UF30-6010-3090-95%5-7
MF40-805-1590-95%5-7
RO15-25150-40075-85%3-5
NF20-3575-15080-90%3-5
🫧 DAF Calculator (Dissolved Air Flotation) Flotation

Design dissolved air flotation systems for TSS, FOG, and algae removal.

📊 Design Parameters

📥 Influent Characteristics

⚙️ Design Criteria

🎯 Performance Targets

💰 Operating Costs

📚 DAF Design Guidelines

ParameterTypical RangeNotes
A/S Ratio0.01-0.05lb air/lb solids removed
Recycle Rate20-50%Of influent flow
Saturator Pressure40-80 psiHigher = more air dissolved
Hydraulic Loading2-6 GPM/sfBased on total flow
Solids Loading1-4 lb/sf/dayTSS basis
Float Solids2-6%Typical without thickening

🗑️ SOLIDS HANDLING

📍 Jump to Section
🚿
WAS Calc
⚙️
Adv WAS
🔄
RAS Calc
🌊
Clarifier
📏
Blanket
🔄
Thickener
🔥
Biogas
🚛
Septage
📊 Sludge Production Estimator
Estimate daily sludge production from primary and secondary treatment
🚿 WAS (Waste Activated Sludge) Calculator
Calculate WAS rate based on target SRT
Aeration Inventory-lb
WAS Rate (mass)-lb/day
WAS Rate (volume)-gpd
WAS Rate-gpm
🚿 Advanced WAS Calculator Multiple Methods

Calculate WAS using different control strategies. Select your preferred method.

📅 SRT (Solids Retention Time) Control

Most common method. WAS rate = Total solids inventory ÷ Target SRT

⏱️ MCRT (Mean Cell Residence Time) Control

Accounts for solids in clarifier and effluent losses

⚖️ F/M (Food to Microorganism) Control

Control based on organic loading. Target F/M typically 0.2-0.5 for conventional activated sludge

📊 MLSS (Constant MLSS) Control

Maintain target MLSS by wasting growth. Simple operational control.

📚 Typical WAS Control Parameters

Process TypeSRT (days)F/MMLSS (mg/L)
Conventional AS5-150.2-0.51,500-3,000
Extended Aeration20-400.04-0.13,000-6,000
Contact Stabilization5-100.2-0.61,000-3,000
SBR10-300.04-0.12,000-5,000
MBR10-250.1-0.48,000-12,000
Nitrification10-200.1-0.32,000-4,000
🔄 RAS (Return Activated Sludge) Calculator Multiple Methods

Calculate optimal RAS rate to maintain target MLSS and prevent settling issues.

📊 RAS Ratio Method

Calculate RAS based on desired RAS/Q ratio. Typical range: 25-100% of influent flow.

🎯 Target MLSS Method

Calculate RAS rate needed to achieve target MLSS based on mass balance.

📏 Sludge Blanket Control Method

Adjust RAS to maintain target sludge blanket depth in clarifier.

📚 RAS Operating Guidelines

ParameterTypical RangeNotes
RAS Ratio (RAS/Q)25-100%Higher during high flows
RAS Concentration6,000-12,000 mg/LShould be 2-4x MLSS
Sludge Blanket1-3 ftKeep below weir level
RAS TSS/MLSS Ratio2.0-4.0Lower indicates poor settling
Clarifier SLR20-35 lb/sf/dayPeak: 50 lb/sf/day max
⚠️ RAS Troubleshooting:
  • Rising blanket: Increase RAS rate or reduce WAS
  • Low RAS concentration: Check for denitrification, reduce RAS rate
  • RAS > 100%: Check for hydraulic issues, high SVI
  • Thin blanket: May reduce RAS, but monitor effluent TSS
🏊 Clarifier Loading Calculator SLR, SOR, WLR

Calculate solids loading rate (SLR), surface overflow rate (SOR), and weir loading rate (WLR) for secondary clarifiers.

🏗️ Clarifier Configuration

Perimeter = πD

💧 Flow & Solids Data

📚 Secondary Clarifier Design Criteria

ParameterAveragePeakUnits
Surface Overflow Rate (SOR)400-8001,000-1,200gpd/sf
Solids Loading Rate (SLR)20-3050lb/sf/day
Weir Loading Rate (WLR)10,000-20,00030,000gpd/lf
Hydraulic Detention Time1.5-2.5-hours
Side Water Depth12-15-ft
✓ Good Settling
SVI < 120, SLR < 25
⚠️ Fair Settling
SVI 120-180, SLR 25-35
✗ Poor Settling
SVI > 180, SLR > 35
🧪 Sludge Judge / Settleometer 30-Min Settling Test

Record settling test readings and calculate SVI, settling rate, and sludge characteristics.

⚙️ Test Setup

📏 Settling Readings (mL)

Enter settled sludge volume at each time interval. Start with initial volume (usually 1000 or 2000 mL).

📚 SVI Interpretation Guide

SVI (mL/g)Settling QualitySludge ConditionAction
< 80ExcellentOld sludge, pin floc possibleMay reduce WAS, check effluent TSS
80-120GoodNormal, healthy sludgeMaintain current operations
120-150FairLight bulking beginningMonitor closely, check DO/nutrients
150-200PoorBulking sludgeIdentify filaments, adjust process
> 200Very PoorSevere bulkingImmediate action required
SVI Formula:
SVI = (Settled Vol mL × 1000) / (Cylinder mL × MLSS mg/L)
Typical Targets:
Conventional: 80-150
Extended Air: 100-200
MBR: N/A (no settling)
🔄 Gravity Thickener Loading
Surface Area-sf
Hydraulic Loading-gpd/sf
Solids Loading-lb/sf/day
Status-
🗜️ Dewatering Performance
⚖️ Plant Mass Balance
For comprehensive mass balance calculations including BOD, TSS, TKN, and TP through the entire treatment train, see the Mass Balance Calculator in the 📐 Hydraulics tab.
🔥 Biogas & Digester Calculator Comprehensive

Complete anaerobic digester analysis: loading, gas production, heating, and energy recovery.

🏗️ Digester Configuration

📥 Sludge Feed

⚡ Performance Parameters

💰 Energy & Economics

📚 Digester Design Guidelines

ParameterStandard RateHigh RateTwo-Stage
SRT (days)30-6010-2010-15 (1st)
VS Loading (lb/cf/d)0.03-0.100.15-0.400.25-0.50
VS Destruction (%)35-5050-6555-65
Temperature (°F)Ambient95 (meso)95-131
MixingNoneContinuousBoth stages
Gas Composition:
CH₄: 60-70%
CO₂: 30-40%
H₂S: 0.1-0.5%
Trace: N₂, H₂, etc.
Energy Content:
Biogas: ~600 BTU/cf
Methane: ~1,000 BTU/cf
1 cf CH₄ = 0.01 therm
1 kWh = 3,412 BTU
🚛 Septage Receiving Calculator Hauled Waste

Calculate septage receiving capacity, loading impacts, and revenue potential.

🏭 Plant Baseline

🚛 Septage Characteristics

📥 Receiving Operations

💰 Economics

📚 Typical Septage Characteristics

ParameterResidentialCommercialGrease TrapPortable
BOD (mg/L)2,000-10,0001,500-5,00015,000-150,0005,000-15,000
TSS (mg/L)5,000-30,0003,000-15,0005,000-50,00010,000-40,000
TKN (mg/L)200-1,000150-50050-200500-2,000
FOG (mg/L)5,000-15,0003,000-10,00050,000-150,0002,000-8,000
⚠️ Considerations:
- Slug loading impacts
- FOG handling capacity
- Grit removal needs
- Odor control
- Screenings increase
✅ Best Practices:
- Meter all loads
- Sample periodically
- Controlled discharge rate
- Spread throughout day
- Maintain manifest records
📦 Sludge Box (Dry) Haul Calculator Roll-off/Dumpster

Calculate sludge box capacity, hauling frequency, and costs for dewatered cake disposal.

🗜️ Cake Production

📦 Box Configuration

💰 Hauling & Disposal Costs

📚 Sludge Box Reference

Box SizeCapacity (CY)Typical Weight LimitBest For
Lugger Box10-158-12 tonsSmall plants, limited space
20 CY Roll-off2015-18 tonsSmall-medium plants
30 CY Roll-off3020-22 tonsMost common size
40 CY Roll-off4020-25 tonsLarge plants, light cake
Typical Cake Densities:
Belt Press (20%): 1,000-1,200 lb/cy
Centrifuge (25%): 1,200-1,400 lb/cy
Plate Press (35%): 1,400-1,600 lb/cy
Dried (90%+): 800-1,000 lb/cy
Cost Factors:
- Haul distance
- Fuel prices
- Disposal facility type
- Weekend/holiday rates
- Contamination charges

📐 INTERACTIVE NOMOGRAPHS

Visual calculation tools for process, chemical & solids parameters

📖 How to Use Nomographs - Reference Guide
⚙️ Process/Biological Nomographs

📊 SRT/MCRT Calculator

Sludge Retention Time
Solids Inventory
--
lbs
÷
Solids Wasted/Day
--
lbs/day
=
SRT
--
days
SRT Scale (days)
051015202530+
Formula: SRT = (Vol × MLSS × 8.34) ÷ (WAS Flow × WAS Conc × 8.34 ÷ 1,000,000) • Typical: 5-15 days (conventional), 15-30 days (extended aeration)

📊 F/M Ratio Calculator

Food to Microorganism
BOD Loading
--
lbs/day
÷
MLVSS Inventory
--
lbs
=
F/M Ratio
--
lb BOD/lb MLVSS/day
F/M Scale
00.10.20.30.40.50.6+
Formula: F/M = (Flow × BOD × 8.34) ÷ (Vol × MLVSS × 8.34) • Typical: 0.05-0.15 (extended aeration), 0.2-0.5 (conventional)

📊 Clarifier Loading Calculator

Surface & Solids Loading
Surface Area
--
sq ft
Overflow Rate
--
gpd/sq ft
--
Solids Loading
--
lbs/day/sq ft
--
Overflow Rate typical: 400-800 gpd/sf (avg), <1,200 (peak) • Solids Loading typical: 20-30 lbs/day/sf (max ~50)

📊 SVI & Settling Calculator

Sludge Volume Index
Settled Volume
--
mL/L
×
1000 ÷ MLSS
--
factor
=
SVI
--
mL/g
SVI Scale (mL/g)
050100150200250300+
Enter values to see SVI interpretation
Formula: SVI = (Settled Volume × 1000) ÷ MLSS • Good: 80-150 mL/g • Bulking: >150 mL/g • Pinpoint floc: <50 mL/g
⚗️ Chemical/Disinfection Nomographs

📊 Chlorine CT Calculator

Contact Time × Concentration
Cl₂ Residual
--
mg/L
×
Contact Time
--
minutes
=
CT Value
--
mg·min/L
CT Requirements (EPA) at pH 7, 20°C:
2-log Giardia
CT ≥ 25
3-log Giardia
CT ≥ 37
4-log Virus
CT ≥ 4
Enter values to see disinfection status
Formula: CT = C × T • Higher pH reduces HOCl effectiveness • Lower temp requires higher CT

📊 Chlorine Dosing Calculator

Feed Rate & Usage
Cl₂ Required
--
lbs/day
Solution Feed
--
gpd
Pump Setting
--
gph
Monthly Usage
--
gallons
Formula: lbs/day = Flow × Dose × 8.34 • GPD = lbs/day ÷ (8.34 × SG × %/100)

📊 pH Adjustment Calculator

Caustic/Acid Dosing
Enter values to calculate
NaOH (50%) Dose
--
gpd
Lime (Ca(OH)₂) Dose
--
lbs/day
Soda Ash Dose
--
lbs/day
Note: Estimates based on alkalinity buffering. Actual dose varies with water chemistry. Jar test recommended.
🚛 Solids/Digestion Nomographs

📊 Digester Gas Production

Methane & Energy
VS Destroyed
--
lbs/day
Total Gas
--
cf/day
Methane
--
cf/day
Energy Value
--
BTU/day
Equiv. kWh: --
Equiv. Therms: --
$/day @ $0.12/kWh: --
Typical: 12-18 cf gas/lb VS destroyed • Methane: 60-70% • Energy: ~600 BTU/cf methane

📊 Dewatering & Polymer Calculator

Belt Press / Centrifuge
Dry Solids
--
lbs/hr
Cake Production
--
lbs/hr wet
Polymer Usage
--
lbs/hr
Dry Tons/Day
--
DT/day (8hr)
Typical polymer: 15-25 lbs/DT • Belt press cake: 18-25% • Centrifuge cake: 22-30%

📊 Thickener Loading Calculator

GBT / DAF / Gravity
Solids Loading
--
lbs/hr/sf
--
Hydraulic Loading
--
gpm/sf
Thickened Flow
--
GPM
Concentration Ratio
--
:1
GBT typical: 40-100 lbs/hr/sf • DAF: 20-40 lbs/hr/sf • Gravity: 5-15 lbs/day/sf

🧭 WIZARDS & DIAGNOSTICS

📍 Jump to Section
📊
Health
🧭
Wizards
🔮
Sims
📚
SOPs
⚖️
Mass Bal
📊 System Health Score
Health
95
/100
Process Control: Excellent
Effluent Quality: Good
Equipment Status: Monitor
Compliance: In Limits
🧭 Select a Troubleshooting Wizard

Choose a problem to diagnose. Each wizard will guide you through step-by-step questions to identify the root cause and recommend solutions.

🔴

High Effluent TSS

TSS exceeding permit limits? Diagnose clarifier, biological, and hydraulic causes.

8 Decision Points →
🟠

Filamentous Bulking

SVI > 150? Poor settling? Identify filament type and targeted solutions.

10 Decision Points →
🔵

High Effluent Ammonia

NH₃-N above limits? Check nitrification, DO, alkalinity, and toxicity.

9 Decision Points →
🟢

Low DO Problems

Can't maintain DO setpoint? Diagnose aeration, loading, and equipment issues.

8 Decision Points →
🟤

Foam/Scum Issues

Excessive foam on basins or clarifiers? Identify foam type and control strategies.

6 Decision Points →
👃

Odor Control

H₂S or septic odors? Locate sources and implement control measures.

7 Decision Points →
🟣

Nutrient Removal

High phosphorus or nitrogen? Optimize Bio-P, chemical, and denitrification.

10 Decision Points →

Blower/Aeration

Equipment issues, high amps, surge? Diagnose blower and air distribution problems.

9 Decision Points →
🔧

Clarifier Mechanical

High torque, scum issues, weir problems? Troubleshoot clarifier equipment.

8 Decision Points →
💧

RAS/WAS Optimization

Sludge return issues? Optimize RAS rate, WAS control, and maintain MLSS.

8 Decision Points →
🧭 Wizard Active
Step 1 of 8 12%

Question will appear here...

📍 Diagnosis Path:
Start → ...
✅ Diagnosis Complete
📜 Recent Diagnoses

No diagnoses completed yet. Run a wizard to see your history here.

🏭 MULTI-PLANT

🏭 Multi-Plant Fleet Management

🏭 Fleet Operations Dashboard

Centralized monitoring and management for multiple treatment facilities

Total Plants

4

Total Capacity

18.5 MGD

Online

3

Avg Efficiency

93.1%

Total Flow

15.1 MGD

Avg Load

82%

📊 Fleet Performance Comparison
North Regional WWTP ONLINE
📍 Houston, TX
Capacity: 5.0 MGD
Flow: 4.2 MGD
Efficiency: 94.5%
Load: 84%
South Municipal Plant ONLINE
📍 Pearland, TX
Capacity: 3.5 MGD
Flow: 2.8 MGD
Efficiency: 92.1%
Load: 80%
East Industrial WWTP MAINTENANCE
📍 Pasadena, TX
Capacity: 8.0 MGD
Flow: 6.5 MGD
Efficiency: 89.7%
Load: 81%
West Community Plant ONLINE
📍 Katy, TX
Capacity: 2.0 MGD
Flow: 1.6 MGD
Efficiency: 96.2%
Load: 80%
⏰ Detention Time (General)
Detention Time-minutes
Detention Time-hours
👥 Population Equivalent
PE (BOD basis)-people
PE (Flow basis)-people
GPD per capita-gpd/person
📅 Sludge Age (Simple)
Sludge Age-days
Status-
📉 Percent Removal (Universal)
Amount Removed-units
Percent Removal-%
🔄 Flow Unit Converter
MGD-
GPM-
GPD-
CFS-
m³/day-
L/s-
🔊 Blower Noise Estimation
Est. Sound Level-dB(A)
Status-
🌍 Carbon Footprint Estimator
Energy CO2-lb CO2/day
Chemical CO2-lb CO2/day
Biogas Offset-lb CO2/day
Net Carbon-lb CO2/day
💰 Treatment Cost Analysis
Total Daily Cost-$/day
Cost per MG-$/MG
Cost per 1000 gal-$/1000 gal
Monthly Cost-$/month
Annual Cost-$/year
📈 Fleet Analytics Summary
93.1%
Fleet Avg Efficiency
↑ 2.3% vs last month
82%
Avg Capacity Utilization
Optimal Range
$45.2K
Monthly Operating Cost
↓ 5% vs budget
99.2%
Compliance Rate
All permits current
💡 Tips: Click on a plant card to select it, then use Edit/Delete buttons. Use Compare to analyze multiple plants side-by-side. Export data to CSV for reporting.

🔀 Interactive Troubleshooting Wizard 9 PROBLEM CATEGORIES

Step-by-step diagnostic decision trees with visual path tracking

⚠️ Select Problem Category
📋 Recent Troubleshooting History
No troubleshooting history yet. Complete a diagnosis to save it here.

🔮 Process Simulations 20 SCENARIOS

"What happens if..." - Predict process changes before you make them

⚡ Quick Scenarios

🛠️ Custom Simulation Builder
📊 CURRENT CONDITIONS
🔄 PROPOSED CHANGES
📜 Recent Simulations
No simulations run yet. Select a scenario above to begin.

📜 Texas TCEQ Certification Prep CLASS D-C-B-A

Practice tests for Texas Wastewater Operator Certification Exams

🌱 ENTRY
Class D
Entry Level Operator
• Basic plant operations
• Safety fundamentals
• Simple calculations
No tests taken yet
📘 INTERMEDIATE
Class C
Intermediate Operator
• Process control basics
• Lab procedures
• Intermediate math
No tests taken yet
📙 ADVANCED
Class B
Advanced Operator
• Supervisor responsibilities
• Advanced process control
• Complex calculations
No tests taken yet
👑 EXPERT
Class A
Chief Operator
• Full plant management
• Regulatory compliance
• All calculations
No tests taken yet
📚 Study by Topic
📜 Test History
No tests taken yet. Start a practice exam to track your progress!
📁
Document Center
SOPs, Permits, P&IDs, and Plant Documentation
0
SOPs
0
Permits
0
P&IDs
📋 Standard Operating Procedures
📋
No SOPs added yet
Click "+ Add SOP" to create your first procedure
🎓
Training & Safety Center
OSHA-compliant safety procedures + 70+ curated training videos
8
Safety Topics
70+
Videos
OSHA
Compliant
⚡ Quick Navigation - Safety
🔒
LOTO
🚧
Confined Space
☠️
H₂S Awareness
🦺
PPE Guide
🚨
Emergency
⚗️
HazCom
Electrical
Checklists
🔒 Lockout/Tagout (LOTO) Procedures OSHA 29 CFR 1910.147
⚠️ Purpose of LOTO
Lockout/Tagout procedures prevent the unexpected startup or release of stored energy during maintenance and servicing activities. At WWTPs, this includes pumps, blowers, mixers, clarifier drives, conveyors, and all electrical equipment.
📋 Standard LOTO Procedure - 8 Steps
1
Preparation
Identify all energy sources. Review equipment-specific LOTO procedures.
2
Notification
Notify all affected employees that equipment will be locked out.
3
Equipment Shutdown
Shut down equipment using normal operating controls.
4
Isolation
Isolate equipment from ALL energy sources.
5
Apply LOTO Devices
Apply your personal lock and tag to each energy isolation point.
6
Release Stored Energy
Bleed air/hydraulic lines, discharge capacitors, release spring tension.
7
Verification
Verify isolation by attempting to start equipment. Confirm zero energy state.
8
Perform Work
Equipment is now safe. Keep LOTO in place until ALL work is complete.
🏭 Common WWTP Equipment LOTO Points
💧 Pumps
• Electrical disconnect (MCC or local)
• Suction/discharge valves
• VFD isolation if equipped
🌀 Blowers/Aerators
• Main electrical disconnect
• Inlet/outlet dampers
• Bleed air pressure
⚙️ Mixers/Flocculators
• Motor disconnect
• VFD isolation
• Impeller blocking
🔄 Clarifier Drives
• Main drive motor disconnect
• Rake mechanism blocking
• Skimmer drive isolation
🚧 Confined Space Entry Procedures OSHA 29 CFR 1910.146
📖 What is a Confined Space?
A space that meets ALL THREE criteria: (1) Large enough to enter, (2) Limited entry/exit, (3) NOT designed for continuous occupancy.
Wet Wells Manholes Digesters Tanks Vaults Clarifiers (drained)
🌡️ Atmospheric Testing Limits
O₂
19.5-23.5%
<19.5% Deficient
LEL
<10%
Exit at 10%
H₂S
<10 ppm
IDLH: 100 ppm
CO
<35 ppm
IDLH: 1,200 ppm
📋 Entry Permit Requirements
☠️ Hydrogen Sulfide (H₂S) Awareness EXTREMELY HAZARDOUS
☠️ ⚠️ ☠️
H₂S IS THE #1 KILLER IN WASTEWATER
Colorless gas - "rotten egg" odor at low levels
OLFACTORY FATIGUE above 100 ppm - you can't smell it!
📊 H₂S Exposure Levels
Level Effects Action
0.01-0.3 ppmOdor thresholdBe aware
10 ppmOSHA PEL, eye irritationExit, ventilate
50-100 ppmSevere damage, loss of smellEmergency! SCBA required
100 ppmIDLH - Can't smell it!Life-threatening
700+ ppmImmediate deathSingle breath fatal
🏭 H₂S Sources at WWTPs
🕳️ Collection
Manholes, wet wells, lift stations
📥 Headworks
Screening, grit removal areas
🔄 Primary
Clarifier scum troughs, sludge wells
🧪 Sludge
Digesters, belt press, truck loading
🦺 Personal Protective Equipment (PPE)
📋 PPE by Task
Task 👷 👓 👂 😷 🧤 👢
General Plant---
Blower Room--
Chemical FeedGoggles-APRChem
Chlorine RoomFull-SCBAChem
Confined Space-SCBA
👷
Head
Type I/II, Class E (electrical rated)
👓
Eye/Face
ANSI Z87.1, side shields
🧤
Hands
Match glove to hazard type
😷
Respiratory
Fit testing required
🚨 Emergency Response
📞 EMERGENCY CONTACTS
Emergency
911
Poison Control
1-800-222-1222
CHEMTREC
1-800-424-9300
🔥
FIRE
  1. Activate fire alarm
  2. Call 911
  3. Evacuate via nearest exit
  4. Meet at assembly point
  5. Do NOT re-enter
☠️
CHEMICAL SPILL
  1. Evacuate upwind
  2. Alert others
  3. Identify chemical (SDS)
  4. Don appropriate PPE
  5. Contain if trained
🏥
MEDICAL
  1. Ensure scene is safe
  2. Call 911
  3. Provide first aid if trained
  4. Get AED if cardiac
  5. Stay with victim
⚠️ CONFINED SPACE RESCUE
NEVER enter without SCBA and retrieval equipment! Most fatalities are would-be rescuers. Call for help, use retrieval system from outside, wait for trained rescue team.
⚗️ Hazard Communication (HazCom) OSHA 29 CFR 1910.1200
🏷️ GHS Hazard Pictograms
💥
Explosive
🔥
Flammable
🧪
Corrosive
☠️
Toxic
⚠️
Irritant
🫁
Health Hazard
📄 SDS - 16 Required Sections
1. Identification
9. Physical/chemical properties
2. Hazard(s) identification
10. Stability and reactivity
3. Composition/ingredients
11. Toxicological info
4. First-aid measures
12. Ecological info
5. Fire-fighting measures
13. Disposal considerations
6. Accidental release
14. Transport info
7. Handling and storage
15. Regulatory info
8. Exposure controls/PPE
16. Other information
⚡ Electrical Safety NFPA 70E
⚡⚠️⚡
ARC FLASH HAZARD
Up to 35,000°F - Always verify de-energized state and wear appropriate PPE
📋 Electrical Safety Rules
1.Only qualified persons work on electrical
2.Assume all circuits energized until proven otherwise
3.Apply LOTO before any electrical work
4.Maintain safe approach distances
5.Wear appropriate arc-rated PPE
6.Never work alone on energized equipment
🦺 Arc Flash PPE Categories
Cat 1
4 cal/cm²
Cat 2
8 cal/cm²
Cat 3
25 cal/cm²
Cat 4
40 cal/cm²
✅ Safety Checklists & Quick Cards
📋 Daily Safety Walk-Through
🃏 Quick Reference Cards

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⚙️ Operations (Hydraulic Flow Order)
💼 Business

📚 Quick Reference Library

🧫 MLSS (Mixed Liquor Suspended Solids)

Process TypeTypical RangeOptimal
Conventional Activated Sludge1,500 - 3,500 mg/L2,000 - 3,000 mg/L
Extended Aeration3,000 - 6,000 mg/L4,000 - 5,000 mg/L
MBR Systems8,000 - 15,000 mg/L10,000 - 12,000 mg/L
SBR Systems2,000 - 5,000 mg/L3,000 - 4,000 mg/L
MBBR Systems2,000 - 4,000 mg/L2,500 - 3,500 mg/L

⏱️ SRT (Sludge Retention Time)

Treatment GoalTypical SRTNotes
BOD Removal Only3 - 5 daysMinimum for stable operation
Nitrification8 - 15 daysTemperature dependent
Extended Aeration20 - 30 daysLow sludge production
Cold Weather (<15°C)15 - 25 daysSlower nitrifier growth
Warm Weather (>20°C)8 - 12 daysFaster kinetics

⚖️ F/M Ratio (Food to Microorganism)

Process TypeF/M RangeOptimal
Conventional0.2 - 0.50.3 - 0.4
Extended Aeration0.05 - 0.150.08 - 0.12
High Rate0.5 - 1.00.6 - 0.8
Contact Stabilization0.2 - 0.60.3 - 0.5

📉 SVI (Sludge Volume Index)

SVI RangeConditionAction
< 100 mL/gExcellent settlingOptimal operation
100 - 150 mL/gGood settlingMonitor closely
150 - 200 mL/gFair settlingInvestigate causes
> 200 mL/gBulking sludgeImmediate action needed

💨 Dissolved Oxygen (DO)

Location/ProcessTarget DONotes
Aeration Basin1.5 - 2.5 mg/LMinimum 1.0 for nitrification
Anoxic Zone< 0.5 mg/LRequired for denitrification
Anaerobic Zone< 0.2 mg/LBio-P removal
Final Effluent> 4.0 mg/LPermit requirement typical

🧪 pH & Alkalinity

ParameterOptimal RangeCritical Limits
Aeration Basin pH6.8 - 7.5< 6.5 or > 8.5 inhibits nitrification
Alkalinity (as CaCO₃)100 - 200 mg/L< 50 mg/L causes pH crash
Alkalinity for Nitrification7.1 mg/L per mg NH₃-NConsumed during nitrification

🚨 Bulking Sludge (High SVI)

Symptoms: SVI > 150, poor settling, rising sludge blanket

  • Low DO: Increase aeration, check diffusers
  • Low F/M: Reduce MLSS, increase wasting
  • Nutrient deficiency: Check N:P ratio (100:5:1 BOD:N:P)
  • Septicity: Check collection system, reduce detention time
  • Low pH: Add alkalinity (lime, soda ash)

🫧 Foaming Problems

Brown/Tan Foam (Nocardia):

  • Reduce SRT to 8-10 days
  • Increase wasting rate
  • Add chlorine to RAS (2-5 mg/L)
  • Spray water to break foam

White Foam:

  • Young sludge - reduce wasting
  • Low MLSS - reduce wasting, increase SRT
  • Surfactants - check industrial inputs

⚠️ Poor Nitrification

Symptoms: High effluent ammonia, low nitrate

  • Low DO: Maintain > 2.0 mg/L in aeration
  • Low SRT: Increase to 12-15 days minimum
  • Low pH: Maintain pH > 6.8, add alkalinity
  • Cold temperature: Increase SRT in winter
  • Toxicity: Check for industrial discharge
  • Insufficient alkalinity: Need 7.1 mg/L alk per mg/L NH₃-N

🔄 Rising Sludge in Clarifier

Symptoms: Clumps of sludge floating, gas bubbles

  • Denitrification: Reduce sludge blanket depth
  • Increase RAS rate
  • Reduce SRT if over-nitrifying
  • Add anoxic zone before clarifier
  • Check for septic conditions

🔬 Pin Floc / Dispersed Growth

Symptoms: Turbid effluent, small floc particles

  • Over-aeration: Reduce DO to 2.0 mg/L
  • Toxicity: Check industrial inputs
  • Low SRT: Increase SRT, reduce wasting
  • Hydraulic washout: Check for I&I during storms
  • Add polymer to clarifier

🧫 High Effluent Phosphorus

Symptoms: Effluent TP > permit limit

  • Chemical addition: Alum, ferric, or ferrous
  • Dose ratio: 1.5-2.5 mol Fe/mol P or 1.5-2.0 mol Al/mol P
  • Bio-P issues: Check anaerobic zone DO (< 0.2 mg/L)
  • Ensure VFAs available in anaerobic zone
  • Check for nitrate recycle to anaerobic zone

📋 TCEQ Typical Effluent Limits

ParameterDaily AvgDaily MaxUnits
BOD₅10 - 2025 - 40mg/L
TSS15 - 2030 - 45mg/L
Ammonia-N (Summer)2 - 54 - 10mg/L
Ammonia-N (Winter)3 - 106 - 20mg/L
Total Phosphorus0.5 - 1.01.0 - 2.0mg/L
E. coli126399CFU/100mL
DO (Minimum)4.0 - 6.0-mg/L
pH6.0 - 9.0S.U.

📊 CBOD₅ vs BOD₅

ParameterWhen RequiredTypical Limit
BOD₅ (Total)Standard permits20 mg/L avg, 40 mg/L max
CBOD₅Nitrifying plants10 mg/L avg, 25 mg/L max
Note:CBOD ≈ 0.8-0.9 × BOD for nitrifying plants

📅 Typical Monitoring Frequency

ParameterSmall (<1 MGD)Medium (1-5 MGD)Large (>5 MGD)
FlowDailyContinuousContinuous
pH, DO, TempDailyDailyContinuous
BOD, TSSWeekly2x/weekDaily
AmmoniaWeekly2x/weekDaily
E. coliWeekly2x/weekDaily
PhosphorusMonthlyWeekly2x/week

🧮 Common Formulas

ParameterFormula
F/M RatioF/M = (Q × BOD × 8.34) / (V × MLSS × 8.34) = Q × BOD / (V × MLSS)
SRT (days)SRT = (V × MLSS) / [(Qw × MLSS_ras) + (Qe × TSS_eff)]
MLSS (mg/L)MLSS = (SRT × Q × BOD × Y) / [V × (1 + kd × SRT)]
OLROLR = (Q × BOD × 8.34) / (V × 1000) lb BOD/1000 cf/day
SVI (mL/g)SVI = (Settled Volume mL/L × 1000) / MLSS mg/L
WAS FlowQw = V / SRT - Qe × (TSS_eff / MLSS_ras)
RAS RateRAS% = MLSS / (MLSS_ras - MLSS) × 100
Detention TimeDT (hr) = V (gal) × 24 / Q (GPD)
Surface LoadingSLR = Q (GPD) / Area (sf)
Weir LoadingWLR = Q (GPD) / Weir Length (ft)

📐 Conversion Factors

Convert FromToMultiply By
MGDGPM694.4
MGDm³/day3,785
lb/daykg/day0.4536
mg/L × MGD × 8.34lb/day-
ftm0.3048
sf0.0929
cfgal7.48
psift head2.31
HPkW0.746

📊 Typical Design Constants

ParameterSymbolTypical Value
Yield CoefficientY0.4 - 0.6 lb VSS/lb BOD
Decay Coefficientkd0.05 - 0.1 day⁻¹
MLVSS/MLSS Ratio-0.70 - 0.85
BOD:N:P Ratio-100:5:1
O₂ for Carbonaceous-1.1 - 1.5 lb O₂/lb BOD
O₂ for Nitrification-4.6 lb O₂/lb NH₃-N
Alkalinity for Nitrif.-7.1 mg/L alk per mg/L NH₃-N
Quick reference SOPs for common wastewater operations. Click any card to view the full procedure.
🚀 Plant Startup

Procedures for starting treatment processes after shutdown

🛑 Emergency Shutdown

Emergency procedures for plant shutdown

🔄 Sludge Wasting

WAS calculation and wasting procedures

⚙️ Clarifier Operations

Primary and secondary clarifier operation

☢️ Disinfection

Chlorination and UV disinfection procedures

🧪 Sampling & Testing

Sample collection and lab testing procedures

⚗️ Chemical Handling

Safe chemical storage and handling

💨 Blower Operations

Aeration blower startup and maintenance

🗜️ Dewatering

Belt press and centrifuge operation

📲 Install WWTP Command Center

Add this app to your home screen for quick access and offline use.

📱 Android (Chrome/Samsung):
  1. Tap the ⋮ menu (3 dots) in browser
  2. Select "Add to Home screen" or "Install app"
  3. Tap Add/Install to confirm
🍎 iPhone/iPad (Safari):
  1. Tap the Share button (□↑)
  2. Scroll down and tap "Add to Home Screen"
  3. Tap Add to confirm
💻 Desktop (Chrome/Edge):
  1. Click the install icon (⊕) in the address bar
  2. Or click ⋮ menu → Install WWTP...
  3. Click Install to confirm
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